Open AccessGeneralized weighted crosstalk for DWDM systems with cascaded wavelength-selective switches
Author(s) -
Mark Filer,
Sorin Tibuleac
Publication year - 2012
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.20.017620
Subject(s) - crosstalk , wavelength division multiplexing , optics , optical filter , computer science , optical communication , electronic engineering , phase shift keying , physics , wavelength , bit error rate , telecommunications , engineering , channel (broadcasting)
A generalized method for estimating transmission penalties from spectrally-shaped crosstalk in cascaded multi-port WSS networks is derived, including effects of ASE, signal filtering, and crosstalk filtering. The weighted crosstalk value is computed by multiplying the shaped interfering signal by the power spectral density of the primary signal. This value is used to predict OSNR penalties in networks with cascaded WSSs of arbitrary port count. Theoretical treatment is supported by extensive numerical simulations and experiments for a variety of network configurations. Examples are presented for 43 Gb/s DPSK and 120 Gb/s DP-QPSK in cascaded ROADM networks with three distinct WSS types.